#include<stdbool.h>
bool checkString(char *s)
{
    int left = 0;
    int right = right + 1;
    int len = strlen(s);

    while (right < len)
    {
        if (s[left] == 'b' && s[right] == 'a')
        {
            return false;
        }
        left++;
        right++;
    }
    return true;
}